Channel Selection for Licensed Assisted Access in LTE Based on UE Measurements

Licensed Assisted Access (LAA) represents a new paradigm for LTE, where unlicensed bands are used in conjunction with licensed bands to increase network capacity. The main challenge of LAA is ensuring that unlicensed bands are shared with WiFi systems in an efficient manner. In this paper, we study a coexistence solution based on channel selection. A centralized channel selection mechanism which increases network capacity of LTE in unlicensed bands is proposed. We also describe the implementation of our scheme using existing LTE signaling mechanisms. Simulation results show that channel selection can improve the performance of both LTE and WiFi by over 100\%.

[1]  Dietmar Kunz,et al.  Channel assignment for cellular radio using simulated annealing , 1993 .

[2]  Sayantan Choudhury,et al.  Performance Evaluation of LTE and Wi-Fi Coexistence in Unlicensed Bands , 2013, 2013 IEEE 77th Vehicular Technology Conference (VTC Spring).

[3]  Carlo Mannino,et al.  Models and solution techniques for frequency assignment problems , 2003, 4OR.

[4]  Elza Erkip,et al.  Small-Cell Traffic Balancing Over Licensed and Unlicensed Bands , 2014, IEEE Transactions on Vehicular Technology.

[5]  Mikko A. Uusitalo,et al.  System performance of LTE and IEEE 802.11 coexisting on a shared frequency band , 2013, 2013 IEEE Wireless Communications and Networking Conference (WCNC).

[6]  Janne Riihijärvi,et al.  Reliability of a radio environment Map: Case of spatial interpolation techniques , 2012, 2012 7th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications (CROWNCOM).

[7]  Janne Riihijärvi,et al.  Characterization and modelling of spectrum for dynamic spectrum access with spatial statistics and random fields , 2008, 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications.

[8]  Josep Mangues-Bafalluy,et al.  Characterizing WLAN Medium Utilization for Radio Environment Maps , 2011, 2011 IEEE Vehicular Technology Conference (VTC Fall).

[9]  Joachim Sachs,et al.  License-exempt LTE systems for secondary spectrum usage: Scenarios and first assessment , 2011, 2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN).